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Finding the Fourth Proportional to 744.97, 1,028.30 and 434.53

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Solution

The fourth proportional to 744.97, 1,028.30 and 434.53 is: 599.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.97 : 1,028.30 = 434.53 : x
  2. Step 2: Convert to fraction form
    744.97/1,028.30 = 434.53/x
  3. Step 3: Cross multiply
    744.97x = 1,028.30 × 434.53
  4. Step 4: Simplify right side
    744.97x = 446,827.20
  5. Step 5: Solve for x
    x = 446,827.20/744.97
  6. Step 6: Final answer
    x = 599.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.